#!/bin/bash

function s1_goto_dir(){
cd "$1" || exit 1;
}

function s2_touch_empty_file_with_given_name(){
touch "$1"
}

function s3_make_directories(){
mkdir  projects
cd projects
mkdir git
mkdir backup
}

function s4_create_6_files(){
touch projects/linux{1,2}_{centos,redhat,c_programming}
}

function s5_make_directories_in_git(){
mkdir  projects/git/linux1 projects/git/linux2
}

function s6_move_files_to_dir_1_or_2(){
mv projects/linux1_* projects/git/linux1/ mv projects/linux2_* projects/git/linux2/ 
}

function s7_create_package_and_compress(){
tar -czvf backup/git.tar.gz git/
}

function s8_delete_dir_git(){
rm -rf projects/git/

}

function s9_recover_from_git_tar_gz_backup(){
tar -zxvf projects/backup/git.tar.gz -C ./projects/
}

function s10_create_package_and_compress(){
cd projects
tar -jcvf backup/git.tar.bz2 git/
}

function s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
	find ./projects -type f -o -type d | sort
}
function s12_get_next_15_minutes_boundary(){
	courrent_timestamp=$(date +%s)
	rounded_timestamp=$(((current_timestamp + 750)/900*900))
	current_timestamp=$(date +%s)
	interval_start_timestamp=$(((current_timestamp / 900)*900))
	next_interval_timestamp=$((interval_start_timestamp + 900))
	next_15min_boundary=$(date -d @"$next_interval_timestamp" +%Y-%m-%d_%H:%M:%S)
	echo "$next_15min_boundary"
}


